which pitcher had the most shutouts from 1977 to 1986

Between the 1977 and 1986 seasons, Bob Knepper pitched the most shutouts, with 27 shutouts.

Interpreted as:

Which pitcher had the most regular-season shutouts from 1977 to 1986?

	NAME	SHO	G	W	L	W%	GS	ERA	SO	CG	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Bob Knepper B. Knepper	27	334	113	116	.493	318	3.44	1,195	73	1	2121.0	2,083	810	935	166	635	37	6	62	8,918	42	5.07	2.69	1.88	0.70	13.4	7.1	1.28	.278	3.97	99	3.54	102	8.84	-26.4
2	Fernando Valenzuela F. Valenzuela	26	210	99	68	.593	200	2.94	1,274	84	1	1554.2	1,295	507	589	86	540	10	4	40	6,363	54	7.38	3.13	2.36	0.50	20.0	8.5	1.18	.272	3.41	84	2.86	81	7.50	116.5
3	Ron Guidry R. Guidry	26	317	163	79	.674	295	3.23	1,623	93	4	2186.2	1,995	784	857	204	567	9	13	18	8,921	50	6.68	2.33	2.86	0.84	18.2	6.4	1.17	.275	3.53	82	3.22	81	8.21	181
4	Steve Rogers S. Rogers	26	276	115	96	.545	271	3.10	1,116	91	1	1968.1	1,811	678	758	104	590	29	2	50	8,099	54	5.10	2.70	1.89	0.48	13.8	7.3	1.22	.273	3.47	86	3.20	89	8.28	91.8
5	Bert Blyleven B. Blyleven	24	289	121	96	.558	286	3.34	1,544	101	0	2078.2	1,906	772	860	189	588	59	1	33	8,597	47	6.69	2.55	2.63	0.82	18.0	6.8	1.20	.276	3.72	84	3.33	85	8.25	136.9
6	Nolan Ryan N. Ryan	24	317	131	110	.544	317	3.19	2,192	87	0	2179.1	1,651	772	886	118	1,088	51	0	40	9,130	127	9.05	4.49	2.01	0.49	24.0	11.9	1.26	.270	3.66	90	2.96	83	6.82	153.2
7	Steve Carlton S. Carlton	22	323	155	103	.601	323	3.13	1,929	93	0	2352.0	2,078	817	946	186	781	20	0	68	9,694	85	7.38	2.99	2.47	0.71	19.9	8.1	1.22	.279	3.62	84	3.11	84	7.95	149.8
8	Scott McGregor S. McGregor	22	323	136	97	.584	288	3.84	849	82	5	2023.1	2,089	863	937	217	471	23	19	25	8,444	23	3.78	2.10	1.80	0.97	10.1	5.6	1.27	.272	4.17	98	3.99	100	9.29	-0.1
9	Tom Seaver T. Seaver	22	302	129	98	.568	299	3.37	1,306	70	0	2064.1	1,820	774	858	193	657	28	1	54	8,530	58	5.69	2.86	1.99	0.84	15.3	7.7	1.20	.256	3.74	88	3.65	96	7.93	35.2
10	Dave Stieb D. Stieb	21	259	102	92	.526	254	3.34	1,069	85	1	1859.0	1,673	690	773	151	631	75	2	26	7,734	31	5.18	3.05	1.69	0.73	13.8	8.2	1.24	.262	3.74	80	3.76	92	8.10	67
11	Dennis Leonard D. Leonard	21	240	112	85	.569	234	3.69	1,019	79	1	1693.2	1,650	695	782	168	450	29	2	30	7,056	62	5.41	2.39	2.26	0.89	14.4	6.4	1.24	.275	4.16	91	3.62	92	8.77	55.8
12	Joe Niekro J. Niekro	20	349	145	115	.558	312	3.32	1,110	81	5	2202.0	2,019	813	934	146	794	39	15	31	9,226	128	4.54	3.25	1.40	0.60	12.0	8.6	1.28	.262	3.82	96	3.69	106	8.25	-59.5
13	Geoff Zahn G. Zahn	20	256	105	95	.525	247	3.77	637	78	0	1682.0	1,810	705	809	142	475	16	3	23	7,091	28	3.41	2.54	1.34	0.76	9.0	6.7	1.36	.287	4.33	94	3.91	97	9.68	23.7
14	Bob Welch B. Welch	19	257	100	77	.565	232	3.13	1,096	41	8	1569.0	1,427	545	608	112	479	33	16	36	6,498	33	6.29	2.75	2.29	0.64	16.9	7.4	1.21	.275	3.49	89	3.22	91	8.19	58.4
15	Jack Morris J. Morris	19	302	144	94	.605	280	3.57	1,327	110	0	2121.2	1,895	842	910	213	754	23	10	58	8,831	92	5.63	3.20	1.76	0.90	15.0	8.5	1.25	.258	3.86	89	3.86	94	8.04	64.5
16	Jerry Reuss J. Reuss	19	308	99	84	.541	246	3.32	841	55	8	1696.1	1,704	626	741	91	427	23	35	55	7,095	46	4.46	2.27	1.97	0.48	11.9	6.0	1.26	.282	3.93	93	3.21	89	9.04	75.9
17	Mike Caldwell M. Caldwell	18	253	102	80	.560	217	3.75	551	81	3	1629.1	1,733	678	757	162	361	18	12	25	6,793	38	3.04	1.99	1.53	0.89	8.1	5.3	1.29	.276	4.18	97	4.01	104	9.57	-28.9
18	Mike Flanagan M. Flanagan	17	306	133	97	.578	300	3.83	1,112	90	1	1995.1	1,998	850	921	187	617	22	3	28	8,358	66	5.02	2.78	1.80	0.84	13.3	7.4	1.31	.282	4.15	99	3.77	95	9.01	46.7
19	Phil Niekro P. Niekro	17	362	149	128	.538	353	3.60	1,594	102	2	2503.0	2,397	1,001	1,151	228	989	52	6	36	10,647	83	5.73	3.56	1.61	0.82	15.0	9.3	1.35	.279	4.14	91	3.86	97	8.62	31.7
20	Ken Forsch K. Forsch	16	252	74	65	.532	155	3.40	490	54	16	1253.0	1,233	473	527	92	299	31	63	32	5,192	13	3.52	2.15	1.64	0.66	9.4	5.8	1.22	.267	3.79	92	3.66	96	8.86	16.3
21	Frank Tanana F. Tanana	16	297	108	113	.489	286	3.69	1,193	70	0	1919.1	1,891	786	897	200	541	61	3	48	8,107	54	5.59	2.54	2.21	0.94	14.7	6.7	1.27	.277	4.21	94	3.75	95	8.87	42.3
22	Joaquin Andujar J. Andujar	15	341	113	98	.536	257	3.48	906	58	9	1841.1	1,696	712	795	127	609	42	32	58	7,663	32	4.43	2.98	1.49	0.62	11.8	7.9	1.25	.262	3.89	98	3.69	103	8.29	-27.9
23	Dennis Eckersley D. Eckersley	15	306	125	109	.534	305	3.79	1,275	85	0	2110.0	2,099	888	958	239	456	44	0	55	8,783	14	5.44	1.95	2.80	1.02	14.5	5.2	1.21	.275	4.09	92	3.68	92	8.95	78.3
24	Tommy John T. John	15	296	130	94	.580	276	3.53	719	82	1	1910.0	2,067	750	862	122	450	34	11	25	8,015	72	3.39	2.12	1.60	0.57	9.0	5.6	1.32	.291	4.06	91	3.54	89	9.74	91.5
25	John Tudor J. Tudor	14	204	85	58	.594	192	3.26	775	44	1	1342.2	1,251	487	544	124	366	25	4	20	5,532	17	5.19	2.45	2.12	0.83	14.0	6.6	1.20	.266	3.65	83	3.64	96	8.39	22.8